The comments in this thread are great. They remind us that in most cases, the biggest problem with networking marketing is not the systems, but network marketers who lack the initiative, continuing motivation and willingness to learn. That doesn't send an encouraging message to prospective downlines who are supposed to be motivated and teachable to qualify as hot prospects. I would recommend an insightful book on this subject by a successful mlm businessman:
Network Marketers are Upset... New Book: "The Worst Things About Network Marketing Are the Network Marketers"
Funny that although many people don't admit their primary motivation to get into mlm is self-improvement, this actually appears one of the greatest benefits. You can develop traits like self-confidence, determination, resilience, resourcefulness and ingenuity. No matter how long you're involved, or what you earn, transferable skills you develop help have potential to help you excel in all areas of your life.